<template>
<div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <el-table :data="roleList" border stripe>
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <el-col :span="5">
                            <el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <el-col :span="19">
                            <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable>{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" @close="removeRightById(scope.row,item3.id)" closable>
                                        {{item3.authName}}
                                    </el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                    <pre>
                    </pre>
                </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
    </el-card>
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <el-tree :data="rightList" :props="treeProps" ref="treeRef" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
        <span slot="footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
    </el-dialog>
</div>
</template>

<script>
export default {
    data() {
        return {
            roleList: [],
            setRightDialogVisible: false,
            rightList: [],
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            defKeys: [],
            roleId: ''
        }
    },
    created() {
        this.getRoleList()
    },
    methods: {
        async getRoleList() {
            const {
                data: res
            } = await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.err('获取角色列表失败')
            }
            this.roleList = res.data
        },
        async removeRightById(role, rightid) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消删除权限')
            }
            const {
                data: res
            } = await this.$http.delete(`roles/${role.id}/rights/${rightid}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败')
            }
            role.children = res.data
        },
        async showSetRightDialog(role) {
            this.roleId = role.id
            const {
                data: res
            } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限失败')
            }
            this.rightList = res.data
            this.getLeafKeys(role, this.defKeys)
            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id
        getLeafKeys(node, arr) {
            // 如果不包含children，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        setRightDialogClosed() {
            this.defKeys = []
        },
        async allotRights() {
            const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
            const idStr = keys.join(',')
            const {
                data: res
            } = await this.$http.post(`roles/${this.roleId}/rights`, {
                rids: idStr
            })
            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRoleList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee;
}

.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>
